40
X-Cite
®
exacte
User Guide
035-00283 rev 3
11.2 Liquid Light Guides
Proper handling and installation of liquid light guides
11.2.1 Liquid light guides have a typical useful life of 4000 hours of operation when
handled properly and installed in a well maintained X-Cite
®
exacte
. The
formation of bubbles is one of the most common reasons for a light guide to
degrade prematurely and result in a sudden reduction in illumination intensity.
Bubbles can form without warning, and if they occur within the first 1500 to 2000
hours of use, is it typically due to overheating and/or mechanical stress to the
light guide. Below are some simple tips to avoid overheating and stressing the
light guide.
11.2.2 Always fully insert the light guide in to the X-Cite
®
unit (i.e. up to the
“A” line
printed on the grey ferrule); this ensures contact with a heat sink to conduct heat
away from the light guide.
11.2.3 Always allow adequate clearance at the rear of the X-Cite
®
unit and microscope
to prevent excessive bending and/or crushing of the light guide against walls.
Minimum bend radius to prevent immediate damage to the LLG is 40mm,
however, a bend radius of at least 75mm is recommended for a light guide while
“in use”. Sharper bends can cause heat to build up and cause problems longer
term.
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